What guideline should a Scrum Master provide regarding work estimation in Scrum?

The guideline regarding work estimation in Scrum emphasizes that estimates are made by the Development Team. This is rooted in the principles of self-organization and collaborative ownership within the Scrum framework. The Development Team possesses the technical expertise and understanding of the work required, making them the most qualified to assess the complexity and effort involved in completing a given task or user story.

Encouraging the Development Team to take responsibility for their own estimates promotes accountability and fosters a shared understanding of the work involved. This approach also empowers team members, enabling them to express their insights and concerns regarding the workload. When the estimates come from the team directly engaged in the work, it often leads to more accurate predictions and a stronger commitment to deliver on those estimates.

This collaborative estimation process aligns with Agile practices, where cross-functional teams work together to achieve common goals. Such practices contribute to effective sprint planning, improved team dynamics, and enhanced overall productivity by building trust and encouraging open communication within the team.